# Linearize the Trigonometric Powers Part 2

Geometry Level 2

$\cos^3 \theta = a_3 \cos (3 \theta) + a_1 \cos( \theta )$

Above shows a trigonometric identity for constants $$a_1, a_3$$.

What is the value of $$a_1 \div a_3$$?

See Part 1, Part 3, and Part 4.

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